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Start ShoppingAthena 140 Main Jet for Keihin Carburetors - High-Performance Fuel System Component
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Description
Upgrade your powersports engine's fuel delivery system with the Athena 140 Main Jet. This high-precision brass component is engineered to deliver consistent fuel flow, enhancing throttle response and overall engine performance for riders who demand reliability and power.
Key Features
- Size: 140 Main Jet - Optimized for standard Keihin carburetor systems, ensuring precise fuel metering for peak engine efficiency.
- Material: Brass - Durable, corrosion-resistant construction withstands high temperatures and fuel exposure for long-lasting performance.
- Weight: 0.01 lbs - Lightweight design reduces moving parts friction while maintaining structural integrity.
- Dimensions: 0.2" Diameter x 0.5" Length - Standard size ensures seamless compatibility with existing carburetor setups.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, the Athena 140 Main Jet offers unmatched precision and durability. Its brass composition resists clogging and wear, while the standardized size ensures easy installation. Riders benefit from improved fuel efficiency, smoother power delivery, and enhanced engine responsiveness—making it an essential upgrade for performance enthusiasts.
SKU:
GMF19EB931
MPN:
P400000140003 EACH
Category:
Intake/Carb/Fuel System
Brand:
Athena
Stock:
In Stock
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Upgrade your powersports engine's fuel delivery system with the Athena 140 Main Jet. This high-precision brass component is engineered to deliver consistent fuel flow, enhancing throttle response and overall engine performance for riders who demand reliability and power.
Key Features
- Size: 140 Main Jet - Optimized for standard Keihin carburetor systems, ensuring precise fuel metering for peak engine efficiency.
- Material: Brass - Durable, corrosion-resistant construction withstands high temperatures and fuel exposure for long-lasting performance.
- Weight: 0.01 lbs - Lightweight design reduces moving parts friction while maintaining structural integrity.
- Dimensions: 0.2" Diameter x 0.5" Length - Standard size ensures seamless compatibility with existing carburetor setups.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, the Athena 140 Main Jet offers unmatched precision and durability. Its brass composition resists clogging and wear, while the standardized size ensures easy installation. Riders benefit from improved fuel efficiency, smoother power delivery, and enhanced engine responsiveness—making it an essential upgrade for performance enthusiasts.| SKU | GMF19EB931 |
|---|---|
| MPN | P400000140003 EACH |
| Brand | Athena |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| KTM | 250 SX-F | 2008-2018 |
| KTM | 450 SX-F | 2008-2018 |
| KTM | 350 SX-F | 2009-2019 |
| Husqvarna | TC 250/450/510 | 2010-2020 |
Frequently Asked Questions
Fits Keihin FCR flat-slide carburetors on KTM/Husqvarna 250/350/450 SX-F models 2008-2020
Jet size depends on your modifications, altitude, and temperature. Stock is usually 165-170. 140 is for heavily modified engines or high altitudes.
Single jets work for fine-tuning. Full jet kits provide multiple sizes for complete re-jetting.
Check your carb model. FCR39/41mm carbs from 2008+ typically compatible.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet needle holder (optional)
Pro Tips
- Clean carb thoroughly before jet change
- Always change main jet with needle clip position adjustment
- Mark your original jet size before removal
Common Mistakes to Avoid
- Not cleaning carburetor passages before installing new jet
- Incorrect jet sizing for altitude/temperature
Comparison vs Stock/OEM
Precision machined brass vs cast OEM jets
Improvements
- More consistent fuel flow
- Better finish reduces clogging
- Exact sizing tolerances
Considerations
- Aftermarket sizing may differ slightly from OEM charts
Durability & Warranty
Expected Lifespan
Lasts entire carburetor life if not damaged
Warranty
Limited manufacturer warranty
Maintenance
Inspect during regular carb cleaning (every 10-20 hours)
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